/*
 * Copyright (c) 2007, 2021, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.sun.org.apache.xpath.internal.functions;

import com.sun.org.apache.xml.internal.dtm.DTM;
import com.sun.org.apache.xpath.internal.XPathContext;
import com.sun.org.apache.xpath.internal.objects.XObject;
import com.sun.org.apache.xpath.internal.objects.XString;

/**
 * Execute the proprietary document-location() function, which returns
 * a node set of documents.
 *
 * @xsl.usage advanced
 */
public class FuncDoclocation extends FunctionDef1Arg {
    static final long serialVersionUID = 7469213946343568769L;

    /**
     * Execute the function.  The function must return
     * a valid object.
     *
     * @param xctxt The current execution context.
     * @return A valid XObject.
     * @throws javax.xml.transform.TransformerException
     */
    public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException {

        int whereNode = getArg0AsNode(xctxt);
        String fileLocation = null;

        if (DTM.NULL != whereNode) {
            DTM dtm = xctxt.getDTM(whereNode);

            // %REVIEW%
            if (DTM.DOCUMENT_FRAGMENT_NODE == dtm.getNodeType(whereNode)) {
                whereNode = dtm.getFirstChild(whereNode);
            }

            if (DTM.NULL != whereNode) {
                fileLocation = dtm.getDocumentBaseURI();
//        int owner = dtm.getDocument();
//        fileLocation = xctxt.getSourceTreeManager().findURIFromDoc(owner);
            }
        }

        return new XString((null != fileLocation) ? fileLocation : "");
    }
}
